putText, cvtColor, font, random and more...

python_opencv_putText_basic.py

import cv2, time, sys
from random import *
import numpy as np

font = cv2.FONT_HERSHEY_SIMPLEX
cap = cv2.VideoCapture(0)
width, height = cap.get(3), cap.get(4)
print(width, height)
ck = 0
start = time.time()
while True:
	ck += 1
	ret, frame = cap.read()
	for i in range(50):
		pos = (randint(0, width), randint(0, height))
		cv2.putText(frame, str(randint(0, 100)), pos, font, 2, (randint(0, 255), randint(0, 255), randint(0, 255)), 2, cv2.LINE_AA)
	frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
	cv2.imshow('Me', frame)
	if cv2.waitKey(1) & 0xFF == ord('q'):
		end = time.time()
		break
cap.release()
cv2.destroyAllWindows()
print(ck/(end-start), 'fps')